Texas Instruments MSP430FR2532IRGET

Overview

MSP430FR2532IRGET from Texas Instruments is an ultra-low-power mixed-signal microcontroller with integrated CapTIvate™ capacitive touch sensing technology, featuring 8KB program FRAM, 512B information FRAM, 1KB RAM, and support for up to 8 self-capacitive or 8 mutual-capacitive electrodes. It operates across 1.8–3.6 V, achieves 126 µA/MHz active current, and delivers <5 µA wake-on-touch power in LPM3.5 - enabling robust touch interfaces in battery-powered smart locks and appliance control panels.

For engineers reviewing the MSP430FR2532IRGET datasheet, MSP430FR2532IRGET pinout, MSP430FR2532IRGET application, or MSP430FR2532IRGET equivalent, key selection criteria include its dedicated 4-channel CapTIvate module, TSSOP-32 package compatibility, FRAM endurance (10¹⁵ writes), and IEC 61000-4-2/4-4/4-6 compliance for ESD and transient immunity in harsh environments.

Technical Context

The MSP430FR2532IRGET implements a 16-bit RISC CPU with on-chip 16-MHz DCO+FLL clock system (±1% accuracy at room temperature), dual eUSCI_A modules (UART/IrDA/SPI) and one eUSCI_B (SPI/I²C), plus four 16-bit timers - including one timer exclusively assigned to CapTIvate signal processing. Its CapTIvate engine performs autonomous electrode scanning, spread-spectrum modulation, and hardware-accelerated noise filtering without CPU intervention.

It integrates an 8-channel 10-bit SAR ADC (200 ksps, internal 1.5-V reference), low-power analog peripherals, and a full LPM3.5 RTC domain with 730 nA typical current draw using a 32.768-kHz crystal. The device supports concurrent self- and mutual-capacitance sensing on shared GPIOs, with electrode capacitance detection range of 0–300 pF and built-in water rejection algorithms.

Key Specifications

Pinout & Package

Package: TSSOP-32 (DA), body size 11 mm × 6.2 mm, thermally enhanced with exposed thermal pad (pin 32 = DVSS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar capacitive touch microcontroller applications.

Compared with MSP430FR2532IRGET, the MSP430FR2533IRGET offers greater memory and electrode scalability for feature-rich UIs, while the MSP430FR2632IRGET retains identical memory but doubles CapTIvate channel count - making it preferable for demanding industrial HMI where noise immunity and sensor density outweigh memory needs.

Availability

MSP430FR2532IRGET is available at Aetrix Electronics and suitable for smart lock keypads, garage door control panels, and small appliance user interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for MSP430FR2532IRGET includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on energy efficiency, reliability, and system-level integration.

The MSP430FR2xx family targets ultra-low-power human-machine interface applications, combining FRAM nonvolatility with autonomous capacitive sensing to eliminate external touch controllers and reduce bill-of-materials in battery-operated devices.

FAQ

What is the maximum number of capacitive touch electrodes supported by the MSP430FR2532IRGET?

The MSP430FR2532IRGET supports up to 8 self-capacitive or 8 mutual-capacitive electrodes. This configuration is fixed per the device's CapTIvate hardware resource allocation and is documented in the SLAS942E datasheet Section 1.1 and Table 3-1. The MSP430FR2532IRGET does not support mixing more than 8 total electrodes across both modes simultaneously - unlike higher-tier variants such as the MSP430FR2533IRGET.

Does the MSP430FR2532IRGET support wake-on-touch from LPM3.5 mode?

Yes, the MSP430FR2532IRGET supports wake-on-touch from LPM3.5 mode with <5 µA typical current consumption. Its dedicated CapTIvate hardware engine performs autonomous electrode scanning while the CPU remains powered down, generating an interrupt upon valid touch detection. This capability is validated per IEC 61000-4-2 and specified in the SLAS942E datasheet Section 5.8 and Figure 5-10.

What package type and pin count does the MSP430FR2532IRGET use?

The MSP430FR2532IRGET uses a 32-pin TSSOP package (orderable code DA), with 19 GPIOs - including 16 CapTIvate-capable pins across P1 and P2 ports. Pinout details, thermal pad connection (DVSS), and signal multiplexing are fully defined in Section 4.1 (Pin Diagrams) and Table 4-2 (Signal Descriptions) of the SLAS942E datasheet.

Can the MSP430FR2532IRGET operate directly from a single-cell Li-ion battery?

Yes, the MSP430FR2532IRGET operates across 1.8 V to 3.6 V, matching the discharge curve of standard single-cell Li-ion (3.0–3.6 V) and Li-polymer batteries. Its SVS circuitry ensures safe brown-out reset behavior down to 1.8 V, and its LPM3.5 RTC mode draws only 730 nA - enabling multi-year operation on coin cells or primary lithium batteries in always-on touch applications.

Is FRAM memory on the MSP430FR2532IRGET subject to wear-out like flash?

No, the MSP430FR2532IRGET's 8KB + 512B FRAM has 10¹⁵ write cycle endurance - effectively unlimited for all practical embedded applications. Unlike flash, FRAM writes are byte-addressable, instantaneous (<50 ns), and require no erase-before-write. This eliminates wear leveling overhead and enables reliable data logging, parameter storage, and over-the-air firmware updates without lifetime concerns.